After a long winter, the crew returns to Blind Frog Ranch to strategize a new plan to get the box out of the underwater cave. And Charlie asks for help to investigate a mysterious death on the ranch.
The results from radiocarbon testing are in, which will tell Duane if the box is Aztec or not. Then, the men discover they are being surveilled by a high-tech camera mounted just above the cave entrance.
When a windstorm ruins visibility in the water, Chad considers a risky blind dive to extract the box. But when intruders are discovered, Duane and his crew realize that time is running out.
Chad makes a huge mistake, derailing the operation to drag the box out of the cavern. But when they pull out some of the box's contents, they are shocked by what they discover.
Determined to get into the cavern, Duane and his team explore new methods to find a dry entrance. While Chad takes to the skies in search of a natural opening. Eric thinks the radioactive rocks found in the box might show them where to dig.
After Duane makes a costly mistake, Eric and Chad finally discover what they've been looking for. However, the crew gets caught in the cross hairs of mysterious intruders.
After the crew drills into a dry cavern, they must devise a plan to protect themselves from radioactivity and poisonous gasses. But as they get close to finally entering the cave, trespassers descend upon the ranch.
As Duane and crew explore the cavern they find themselves overcome by a deadly and invisible gas cloud. Complications with their rescue leaves them wondering if they will make it out alive.
Duane and Chad Ollinger return to Blind Frog Ranch with cutting-edge tech, hoping to unearth $3 billion in hidden treasure. Shocking new information on the underground tunnel emerges. Claim jumpers invade the property, threatening to derail everything.
Searching for the hidden entrance to the cave system, the team uncovers an ancient vent shaft above the Energy Zone. But an explosion triggers an underground tsunami that threatens to flood the cave system.
Parker banks his first gold of the season from the Unforgiven cut. One of Rick's rock trucks slides down a ravine, and he tries to broker a season-saving deal with Tony. Fred Lewis makes a big decision.
Rick's landlord demands 50 ounces of gold by the end of the week. An unexpected visit to Tony's Indian River claim brings devastating news, and Parker's crew battles a busted excavator and spotty ground at the Unforgiven cut.
Desperate for cash, Parker goes ditch digging on his Dominion Creek claim. Tony finally gets his first gold of the year. Rick prospects for a new cut to keep his season alive.
Rick Ness comes clean about his gold mining adventures from the early days working with Parker to the obstacles and battles he's faced on and off the claim. Then, Rick looks to the future.
Rick's season is all riding on a move to the new Bacon Strip cut. As Parker tries to dig out of his financial hole, the team must deal with a loader crash. Monica Beets takes charge of the Indian River.
As the countdown to the storm of the century begins, the fleet races to mine. Reaper Nation hits deeper waters while Shawn, Emily, Vernon and Chris all fight large swells to get gold until the bitter end.
A teenage girl in Korea is martyred in prison and becomes a national hero. Today, the facility where she was held stands in remembrance of her bravery and the Korean struggle for independence.
Rick's season is all riding on a move to the new Bacon Strip cut. As Parker tries to dig out of his financial hole, the team must deal with a loader crash. Monica Beets takes charge of the Indian River.
As the countdown to the storm of the century begins, the fleet races to mine. Reaper Nation hits deeper waters while Shawn, Emily, Vernon and Chris all fight large swells to get gold until the bitter end.
A teenage girl in Korea is martyred in prison and becomes a national hero. Today, the facility where she was held stands in remembrance of her bravery and the Korean struggle for independence.
The Kellys quarrel while trying to make their gold-sucking Crawler work. Some anatomical-looking worms in the sea may lead Shawn to gold. Vernon's best laid plans falter as he deals with health issues. Jane receives news of the birth of Emily's baby.
As winter closes in on the mine, paydirt dwindles and the Black Pearl is down, Todd's 1,000-ounce goal looks out of reach. The Hoffmans gamble by running the Holy Roller day and night. Hunter races to find a new clutch for the Black Pearl.